Panel problem: Lost keyboard focus in Photoshop on Mac OSX

Some background: I making a plugin that consists of some photoshop scripts and a panel created in Adobe Configurator. Basically the panel has some buttons which executes some functions in the script. The plugin is described in greater detail and can be downloaded here http://lumens.se/tychpanel

The problem: To reproduce the problem, do the following:

• Give the panel focus by clicking somewhere on it.
• Switch to another application, then back to Photoshop. Keyboard focus is lost.

Any ideas why this happens, and what to do about it?

Note: this is somewhat of a cross-post started at http://www.ps-scripts.com/bb/viewtopic.php?f=2&t=4021&sid=d3c3d77dd128 984f8ee30252f0f4cf2a however, as I think it's more of a Configurator / Panel issue rather than a scripting issue I'm now asking here as well.